Piping and the like



Jan. 26, 1932. E. la` I UITWILER PLPING AND THE LIK'E A Filed June 1o,195o by@ @5% M7 Y Patented Jan. 26, 1932 UNITED sTATEs PATENT OFFICEEDWARD B. LU'ITWIELER, OF MALDEN, MASSACHUSETTS, ASSIGNOR TO AMERICANSTAY COMPANY, F EAST BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHU-SETTS PTPING AND THE LIKE Application led .Tune 10,

My invention relates to piping and similar material commonly employedfor purposes of ornamentation, for example, ornamenting the edges of theuppers of shoes at the shoe openi g. f

The invention will be best understood from the following descriptionwhen read in the light of the accompanying drawings, while the scope ofthe invention will be more particularly pointed out in the appendedclaims.

In the drawings Figs. 1 and 2 schematically represent one form ofapparatus employed for practice of the method according to theinvention;

Fig.3 is a plan of a strip of flexible material illustrating certain ofthe steps of the method performed by the apparatus according toFig.' 1;

Fig. 4 is a section onthe line 4 4 of Fig. 3;

Fig. 5 is a plan of the strip illustrating the subsequent operationsvperformed thereon by the apparatus according to Fig. 2; and

Fig. 6 is a section on the line 6 6 of Fig. 5.

The piping made according to the invention may take various forms, forexample, that indicated at the right hand side of Fig. 5 which inconnection with Fig. 6 shows the piping as comprising a strip 1 offlexible material having one edge portion 3 thereof folded over andpreferably cemented or otherwise secured to the body of the strip, whilethe other edge portion is serrated as indicated at 5, these serrationspermitting the strip to be bent without buckling when Iitted to thearticle to which it is applied.

Preferably, in forming the piping a strip 7 of leather or other flexiblematerial is fed through a double edge folder indicated schematically at9 in Fig. 1 to fold the opposite edge portions 3 of the strip asindicated at the right hand side of Fig. 3 taken in connection with Fig.4. The folds 3 may be secured to thebody of the strip in any convenientmanner, but preferably, for a purpose hereinafter described, arecemented thereto by use of a Water insoluble cement, such as rubberdissolved in a volatile solvent, which may be applied to the surface ofthe strip prior to assing through the double edge folder.

erein, for applying the cement to the strip 1930.A serial No. 460,160,

the latter is shown as passing over a stationary surface 11 (Fig. l)with the opposite side in wiping contact with a known form of cementapplier and spreader 13. After leaving the folder 9 the strip may beguided over suitable rolls 15 'to expose a considerable length of it tothe air so as to permit the cement to dry and harden.

rIhe folded strip 17 preferably is then coated at the folded sidethereof witha cernentitious material which when dry is nontacky, butwhich can be readily rendered adhesive by moistening it with water.cementitious material may be applied by use of the apparatusschematically indicated in Fig. 2, in which the strip 17 is passed overa stationary surface 19 with its opposite side in wiping contact with aknown form of cement applier and spreader 21, after which the strip ispassed over the rolls 23 to permit it tofdry, whereupon it passesthrough the serrating rolls 25 which act to sever the halves of thesheet along a serrated line 27 between the folds 3 as indicated in Fig.5 to form two finished strips.

Preferably, the cementitious material applied to the strip by theapplier and spreader 21 is pliable so as not to flake ofi' when thestrip is serrated or when the finished piping is bent in being appliedto the article in connection with which it is used. Also the materialpreferably when dry has no traces of tackiness, so that it may readilybe Wound on spools without the use of protective layers of gauze forpreventing the layers of piping adhering to each other. I have foundthat such a glue may be prepared by adding glycerin to bone glue, asatisfactory example of the composition of this glue being equal partsby weight of bone glue and water with an amount of glycerin equal to 10%the Weight of the glue. This glue is liquid at about 12()o F., at whichtemperature it may be applied to the strip, and when cold it forms anextremely hard non-tacky layer on the strip vand may be renderedadhesive by moistening it with water, and at the same time when hard isextremely pliable. The glue described, in common with all or most otherwater soluble glues, gums and the like, has

This

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the property when dry of forming a quick drying adhesive when moistenedwith water, due largely to the fact that such substances arehydroscopic, and this property is retained when the glue is compoundedas above specified. In this connection it will be observed that by useof rubber cement for securing the folds to the body of the strip anypossibility of loosening the folds when the glue is applied, or when theglue is softened by moistening it with Water, is effectively avoided.

It will be understood that wide deviations may be made from the forms of.the invention herein described without departing from the spirit of theinvention.

Claims:

1. Piping comprising a strip of exible material one edge of which isfolded over and cemented to the body of said strip with water insolublecement and the other edge of which is so formed as to render said stripfreely bendable laterally, said strip having on the side thereof onwhich the fold lies a layer of pliable non-tacky cementitious materialcapable of being made adhesive when moistened with water. t

2. Piping comprising a strip of iexible material one edge portion ofwhich is folded over and cemented to the body of said strip with waterinsoluble cement and the other edge portion of which is so formed as torender said strip freely bendable laterally, said strip having on'the soformed portion thereof ,a layer of pliable non-tacky cementitiousmaterial capable' yof being made adhesive when moistened with water. 3.The method of making piping which comprises applying a rubber cement toone side of a strip of flexible material and folding the edge portionsthereof'against said side, whereby to secure said edge'portions to thebody of the strip, coating the folded strip on the side thereof on whichthe folds' lie with hot, quick drying, water soluble glue, and, upondrying of the latter, splitting the strip longitudinally thereof along aserrated line between the folded edge portions thereof. y

4. The method of making piping which comprises applying a waterinsoluble cement to one side of a strip of flexible material and foldingthe edge portions thereof against said side, whereby to secure said edgeportions to the body of the strip, lcoating the folded stripon the sidethereof on which the folds lie with quick drying, water soluble glue,and

EDWARD B. LUITWIELER.

upon drying of the latter, operating upon the strip between the foldededge portions thereof to divide the strip into two strips freelykbendable laterally.

5. Piping comprising a strip of flexiblel material one edge portion ofwhich is folded over and cemented to the body of said strip with waterinsoluble cement and the other edge portion of which is so formed as torender said strip freely bendable laterally, said

